Registered Nurses' Association of Ontario

Body Mass Index (BMI) calculation

Body Mass Index is calculated as follows:

Weight in kilograms divided by height in metres squared


               BMI = weight(kg)/height(m)2

Waist circumference should be measured at the point of the torso located midway between the lowest rib and the iliac crest.

Chronic Disease
Nursing Management of Hypertension
Point of Care Resources